Here’s a list of the operators you’ve met so far, and the order of precedence.
This can make a difference, as we saw during the mathematical operators. Don’t
worry about these too much, unless you’re convinced that your math or logical
is correct. In which case, you might have to consult the following:
The only operators you haven’t yet met on the list above are the =
= = and != = operators.
In recent editions of PHP, two new operators have been introduced: the triple
equals sign ( = = =) and an exclamation, double equals ( != =). These are used
to test if one value has the same as another AND are of the same type. An example
would be:
$number = 3;
$text = ‘three’;
if ($number === $text) {
print(“Same”);
}
else {
print(“Not the same”);
}
So this asks, “Do the variables match exactly?” Since one is text
and the other is a number, the answer is “no”, or false. We won’t
be using these operators much, if at all!
Ok, if all of that has given you a headache, let’s move on to some practical
work. In the next section, we’ll take a look at HTML forms, and how to get data
from them. This is so that we can do other things besides printing to the screen.

Kaynak : https://www.homeandlearn.co.uk/php/php3p12.html ‘sitesinden alıntı